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feat(api/v2): add shared conditional read helper and document list params 

conditionalReadResponse applies the If-Match/If-None-Match/If-Modified-Since
precondition (304/412) and returns the shared read envelope. The caller's
permission is folded into the ETag so a share/role change invalidates the cache
even when the model's modified time is unchanged.

Also adds doc: tags to the shared ListParams (q/page/per_page).
This commit is contained in:
kolaente 2026-06-04 22:45:09 +02:00 committed by kolaente
parent 72445c4d2f
commit 6836903c5f
1 changed files with 21 additions and 3 deletions
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24
pkg/routes/api/v2/types.go
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@ -16,6 +16,13 @@
package apiv2
import (
"fmt"
"time"
"github.com/danielgtaylor/huma/v2/conditional"
)
// Paginated is the standard list-response envelope for every /api/v2 list operation.
type Paginated[T any] struct {
Items []T `json:"items"`
@ -46,9 +53,9 @@ func NewPaginated[T any](items []T, total int64, page, perPage int) Paginated[T]
// ListParams carries the standard (page, per_page, q) query shape for list operations.
type ListParams struct {
Page int `query:"page" default:"1" minimum:"1"`
PerPage int `query:"per_page" default:"50" minimum:"1" maximum:"1000"`
Q string `query:"q"`
Page int `query:"page" default:"1" minimum:"1" doc:"1-based page number."`
PerPage int `query:"per_page" default:"50" minimum:"1" maximum:"1000" doc:"Items per page (max 1000)."`
Q string `query:"q" doc:"Search query; filters the list to items matching this string."`
}
// singleBody is the create/update response envelope (no ETag).
@ -62,5 +69,16 @@ type singleReadBody[T any] struct {
Body *T
}
// permission is folded into the ETag so a share/role change invalidates the cache.
func conditionalReadResponse[T any](p *conditional.Params, body *T, modified time.Time, permission int) (*singleReadBody[T], error) {
e := fmt.Sprintf("%d-%d", modified.UnixNano(), permission)
if p.HasConditionalParams() {
if err := p.PreconditionFailed(e, modified); err != nil {
return nil, err
}
}
return &singleReadBody[T]{ETag: `"` + e + `"`, Body: body}, nil
}
// emptyBody marks delete / no-content operations.
type emptyBody struct{}